Use Chrome for Testing so --load-extension works again

Branded google-chrome-stable (Chrome 145) silently ignores --load-extension
since the 2025 Chrome RFC removed it from branded builds, so all 3 unpacked
extensions failed to load (empty chrome://extensions list, no error in log).

Install Chrome for Testing 145.0.7632.117 (unbranded, same version line where
--load-extension still works) and launch it instead of google-chrome-stable.
Everything else (monitor-server, socat CDP proxy on 9222, navigate.py, flags)
is unchanged. Verified locally: all 3 extension service workers register.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -1,2 +1,5 @@
 # Hugging Face secret token — never commit
 hf-token
+
+# Pasted screenshots / scratch images
+image.png

Dockerfile

@@ -7,10 +7,21 @@ COPY chatgpt-free-api/gpt-extension /opt/gpt-extension
 COPY free-gemini-api/gemini-extension /opt/gemini-extension
 COPY flow-agent/Flow-extension /opt/flow-extension
 
+# Install Chrome for Testing (unbranded). Branded google-chrome-stable (>=128)
+# silently ignores --load-extension, so unpacked extensions never load. CfT is the
+# unbranded build of the same Chrome version where --load-extension still works.
+ARG CFT_URL=https://storage.googleapis.com/chrome-for-testing-public/145.0.7632.117/linux64/chrome-linux64.zip
+RUN apt-get update && apt-get install -y --no-install-recommends unzip && \
+    curl -fsSL "$CFT_URL" -o /tmp/cft.zip && \
+    unzip -q /tmp/cft.zip -d /opt && \
+    rm -f /tmp/cft.zip && \
+    apt-get purge -y unzip && apt-get autoremove -y && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
 # Set correct permissions and ownership
 RUN rm -rf /opt/flow-extension/_metadata && \
-    chown -R 1000:1000 /opt/gpt-extension /opt/gemini-extension /opt/flow-extension && \
-    chmod -R 755 /opt/gpt-extension /opt/gemini-extension /opt/flow-extension
+    chown -R 1000:1000 /opt/gpt-extension /opt/gemini-extension /opt/flow-extension /opt/chrome-linux64 && \
+    chmod -R 755 /opt/gpt-extension /opt/gemini-extension /opt/flow-extension /opt/chrome-linux64
 
 # Replace the start script with the non-root version
 COPY --chmod=755 start_hf.sh /start.sh

start_hf.sh

@@ -3,7 +3,7 @@
 # Graceful Shutdown Handler
 cleanup() {
     echo "🛑 Shutting down..."
-    pkill -TERM google-chrome 2>/dev/null || true
+    pkill -TERM -f chrome-linux64 2>/dev/null || true
     sleep 5
     exit 0
 }
@@ -174,7 +174,7 @@ python3 -u /tmp/navigate.py >> /home/chrome/chrome.log 2>&1 &
 
 # 8. Launch Chrome Headless
 echo "✨ Launching Chrome Headless..."
-google-chrome-stable \
+/opt/chrome-linux64/chrome \
   --headless=new \
   --no-sandbox \
   --disable-setuid-sandbox \